Table 3.

Effects of RFI line and hygiene of housing conditions on tissue lipid content in growing pigs

Line	Low RFI		High RFI			P values
Hygiene	Good	Poor	Good	Poor	MSE	Line	Hygiene	LxH
Week 6 (n = 36)
SCAT	61.7	59.2	60.0	59.1	7.2	0.71	0.48	0.73
PRAT	71.2	66.3	65.9	59.6	9.1	0.05	0.08	0.83
Liver	3.2	3.5	3.3	3.5	0.4	0.60	0.11	0.82
LL	0.81	0.70	0.95	1.06	0.30	0.02	0.99	0.30
Week 13–14 (n = 35)
SCAT	77.2	70.7	69.4	67.5	5.8	0.12	0.45	0.96
PRAT	81.9	79.9	83.8	79.0	5.1	0.83	0.07	0.48
Liver	3.5	4.0	3.7	4.1	0.8	0.53	0.12	0.94
LL	0.88	0.99	1.36	1.23	0.35	0.002	0.33	0.52

Pigs from two genetic lines divergently selected for low (LRFI) or high (HRFI) RFI were housed either in good or poor hygiene conditions during the first 6 weeks after their transfer in growing-finishing pens (period 1). Half of these pigs were killed at week 6, whereas another half were placed in good hygiene conditions until slaughter at weeks 13 or 14 (period 2). Subcutaneous (SCAT) and perirenal (PRAT) adipose tissues, liver and longissimus lumborum (LL) muscle were sampled in pigs at the end points of the two periods. Lipid content was expressed in gram per 100 g of wet tissue. LxH: interaction between hygiene (H) and RFI line (L). MSE: root mean standard error of the statistical model. Bold face highlights significant differences (P ≤ 0.05) between treatments, and when italicized, this denotes a trend (0.05 < P ≤ 0.10)